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• Grub does not autoboot the default option after upgrade to 12.10

  - by Petr Kozelka

  I recently upgraded Ubuntu from 12.04 to 12.10 and since that time, the system does not automatically boot. It always opens the boot menu, and I have to press Enter to make it boot Ubuntu. It seems to be ignoring the timeout value, and using a 'neverending' timeout. There are no other systems (no dual boot), only the options originally installed by default Ubuntu 12.04 installation. My /etc/default/grub has only these effective options: GRUB_DEFAULT='Ubuntu' GRUB_HIDDEN_TIMEOUT=1 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=1 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" GRUB_TERMINAL=console I experimented with GRUB_DEFAULT, giving it values '0', '1', 'Ubuntu' but nothing helps. Yes I always run update-grub afterwards. How can I make the system booting again ?

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• How do I get a Canon MP550 working with Gutenprint?

  - by Marek

  My printer canonMP550 doesn't work with i7 x86 64bit under Ubuntu 11.10 with cups+Gutenprint2.5.7. What I found, is: in gutenprint it is translated into ip4000 only, but it belongs to the group ip4700, which is translated into ip4300 (parameter). I tried to correct, read only, what to do? Next is gutenprint uses cups 1.2, but installed is cups 1.5 , so instead system/library/ color sync/ ..... it is usr/share/color/icc/sRGB.icc. So this seem to be real bugs, but Ii am new and need help to correct this staff!

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• Draw order in XNA

  - by Petr Abdulin

  It is possible to set draw order of a DrawableGameComponent by setting DrawOrder property. But is it possible to set draw order of "main" Game class? I have 2 DrawableGameComponents, and Draw method of a main Game class is called first, while I want it to be the last. Should I just mode all "main" draw code to another component and set it DrawOrder? Answer: seems like I'm just confused myself a little. Black on black, that's why I didn't saw it. Main Draw is called last, as expected.

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• How is constant buffer allocation handled in DX11?

  - by Marek

  I'm starting with DX11 and I'm not sure if I'm doing the things right. I want to have both pixel and vertex shader program in one file. Both use some shared and some different constant buffers. So it looks like this: Shader.fx cbuffer ForVS : register(b0) { float4x4 wvp; }; cbuffer ForVSandPS : register(b1) { float4 stuff; float4 stuff2; }; cbuffer ForVS2 : register(b2) { float4 stuff; float4 stuff2; }; cbuffer ForPS : register(b3) { float4 stuff; float4 stuff2; }; .... And in code I use mContext->VSSetConstantBuffers( 0, 1, bufferVS); mContext->VSSetConstantBuffers( 1, 1, bufferVS_PS); mContext->VSSetConstantBuffers( 2, 1, bufferVS2); mContext->PSSetConstantBuffers( 1, 1, bufferVS_PS); mContext->PSSetConstantBuffers( 3, 1, bufferPS); The numbering of buffers in PS is what bugs me, is it alright to bind random slots to shaders (in this example 1 and 3)? Does that mean it still uses just two buffers or does it initialize 0 and 2 buffer pointers to empty? Thank you.

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• Android application Database Framework

  - by Marek Sebera

  When creating mobile (specially Android) application, I usually come to touch with similar pattern of working with data. Usually I need to fetch some remote data (covered by authorization process) to local cache. And on next request: Check networking Check presence of cache file Check version of cache file (if networking) Get new version and save cache (if networking and file not in cache, or outdated) Data store is no-SQL JSON Document-Based (and yes, I know about CouchDB Android version, but it doesn't fit my needs yet.) Process of authorizing to data source and code for check version of local cache is adapted to application. But the other code (handling network, saving cache, handling exceptions,...) is always the same. Is there any Data Store helper I can use, which provides functions I described above?

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• What's the proper term for a function inverse to a constructor? Deconstructor, destructor, or something else?

  - by Petr Pudlák

  Edit: I'm rephrasing the question a bit. Apparently I caused some confusion because I didn't realize that the term destructor is used in OOP for something quite different - it's a function invoked when an object is being destroyed. In functional programming we (try to) avoid mutable state so there is no such equivalent to it. (I added the proper tag to the question.) Instead, I've seen that the record field for unwrapping a value (especially for single-valued data types such as newtypes) is sometimes called destructor or perhaps deconstructor. For example, let's have (in Haskell): newtype Wrap = Wrap { unwrap :: Int } Here Wrap is the constructor and unwrap is what? I've seen both, for example: ... Most often, one supplies smart constructors and destructors for these to ease working with them. ... at Haskell wiki, or ... The general theme here is to fuse constructor - deconstructor pairs like ... at Haskell wikibook (here it's probably meant in a bit more general sense). The questions are: How do we call unwrap in functional programming? Deconstructor? Destructor? Or by some other term? And to clarify, is this terminology applicable to other functional languages, or is it used just in the Has

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• What's the proper term for a function inverse to a constructor - to unwrap a value from a data type?

  - by Petr Pudlák

  Edit: I'm rephrasing the question a bit. Apparently I caused some confusion because I didn't realize that the term destructor is used in OOP for something quite different - it's a function invoked when an object is being destroyed. In functional programming we (try to) avoid mutable state so there is no such equivalent to it. (I added the proper tag to the question.) Instead, I've seen that the record field for unwrapping a value (especially for single-valued data types such as newtypes) is sometimes called destructor or perhaps deconstructor. For example, let's have (in Haskell): newtype Wrap = Wrap { unwrap :: Int } Here Wrap is the constructor and unwrap is what? The questions are: How do we call unwrap in functional programming? Deconstructor? Destructor? Or by some other term? And to clarify, is this/other terminology applicable to other functional languages, or is it used just in the Haskell? Perhaps also, is there any terminology for this in general, in non-functional languages? I've seen both terms, for example: ... Most often, one supplies smart constructors and destructors for these to ease working with them. ... at Haskell wiki, or ... The general theme here is to fuse constructor - deconstructor pairs like ... at Haskell wikibook (here it's probably meant in a bit more general sense), or newtype DList a = DL { unDL :: [a] -> [a] } The unDL function is our deconstructor, which removes the DL constructor. ... in The Real World Haskell.

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• Naming conventions for newtype deconstructors (destructors?)

  - by Petr Pudlák

  Looking into Haskell's standard library we can see: newtype StateT s m a = StateT { runStateT :: s -> m (a, s) } newtype WrappedMonad m a = WrapMonad { unwrapMonad :: m a } newtype Sum a = Sum { getSum :: a } Apparently, there (at least) 3 different prefixes used to unwrap a value inside a newtype: un-, run- and get-. (Moreover run- and get- capitalizes the next letter while un- doesn't.) This seems confusing. Are there any reasons for that, or is that just a historical thing? If I design my own newtype, what prefix should I use and why?

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• BI Applications 7.9.6.3 and EBS 12.1.3 Vision: Integrated Demo Environments

  - by Mike.Hallett(at)Oracle-BI&EPM

  If you need a combined BI-Applications + eBusiness Suite Applications demonstration environment, or for proof of concept work for your customers, then these versions of images on Oracle Virtual Box are now available for partners to download and use.  To get access to these images, Partners must be OPN members, specialised in OBI or BI-Apps.   This is an integrated Demo/Test Drive/POC/Self Enablement environment including two separate images (in English) representing the entire Oracle Stack – Applications, Middleware, Database, Operating System and Virtual Machine. Minimum Hardware requirements for each image to run separately 4GB RAM Minimum Hardware requirements for both images to run concurrently 8GB RAM Dual CPU 64 bit OS   BI Applications 7.9.6.3 Linux based and running on Oracle Virtual Box and compatible with OVM Image Content: BI Application Analytics demo data extracted from EBS 12.1.3 Vision for Financials and HR using EBS 12.1.3 Vision (image supplied) Built Integration to EBS 12.1.3 Vision image (provided). Fully functional BI Applications 7.9.6.3 software install and configuration Image can be connected to load any data from any other compatible source system. BI Apps Demo data is based on OOTB EBS Vision 12.1.3 Configured to run BI Apps data load for all other modules of EBS 12.1.3 Vision. Includes OBIEE Sample demonstration content Documented scripts for running presentations, demonstrations and Test Drives Image Size: 34GB zip, 84GB unzip.  Min Hardware 4GB RAM         EBS Vision 12.1.3 Linux based and running on Oracle Virtual Box and compatible with OVM Image Content: eBusiness Suite (EBS) Applications Vision 12.1.3 Standard Vision instance with all given setups, configurations and data Source system for BI Apps 7.9.6.3 Image Size: 76GB zip, 300GB unzip.  Min Hardware 4GB RAM Distribution: The Virtual Box images are posted on an external FTP server @ BI Applications 7.9.6.3 EBS12.1.3   To download, Partners need to request the current password to access the images.  To request the current ftp.oracle.com password and the password required to unzip the images, please email Marek Winiarski   Support Contact =  Marek Winiarski: Oracle Partner Solution Consultant

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• Bitbucket - permission denied (public key)

  - by drupality

  I have repos in github and bitbucket. First I wanted to use same public key in bb and gh with no luck. So I created another public key, my .ssh/config file look like this: Host bb HostName bitbucket.org User somename PreferredAuthentications publickey IdentityFile C:/Documents and Settings/Marek/.ssh/bb Host github HostName github.com User somename PreferredAuthentications publickey IdentityFile C:/Documents and Settings/Marek/.ssh/id_rsa bb.pub is for bitbucket. I pasted key from this file to bitbucket. I still having Permission denied (public key) when I try to push my initial commit. Could somebody help?

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• NetBeans PHP Development Blog and User Praise

  - by christopher.jones

  Are you not using the Netbeans IDE for your PHP development? My new colleague Petr Pisl recently sent me email and mentiond there is a NetBeans PHP team blog and a page of great feedback on NetBeans PHP support.

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• openvpn TCP/UDP slow SSH/SMB performance

  - by Petr Latal

  I have question about strange behavior of my openVPN configuration on Debian lenny. I have 2 server configs (one proto tcp-server based and one proto udp based). ISP bandwidth is 7Mbit/7Mbit. When I uses proto tcp-server my download server rate is fine around 6,4 Mbit/s, but upload rate is about 3Mbit/s. When I uses proto udp, my download server rate is around 3Mbit/s and upload rate around 6,4Mbit/s. I tried to handle the MTU, MSSFIX and cipher on/off on server and client configs to synchronize rates, but without solution. Here is TCP based SERVER config: mode server tls-server port 1194 proto tcp-server dev tap0 ifconfig 11.10.15.1 255.255.255.0 ifconfig-pool 11.10.15.2 11.10.15.20 255.255.255.0 push "route 192.168.1.0 255.255.255.0" push "dhcp-option DNS 192.168.1.200" push "route-gateway 11.10.15.1" push "dhcp-option WINS 192.168.1.200" route-up /etc/openvpn/routeup.sh duplicate-cn ca /etc/openvpn/ca.crt cert /etc/openvpn/server.crt key /etc/openvpn/server.key dh /etc/openvpn/dh2048.pem log-append /var/log/openvpn.log status /var/run/vpn.status 10 user nobody group nogroup keepalive 10 120 comp-lzo verb 3 script-security 3 plugin /usr/lib/openvpn/openvpn-auth-pam.so system-auth persist-tun persist-key mssfix cipher BF-CBC Here is UDP based SERVER config: port 1194 proto udp dev tun0 local xx.xx.xx.xx server 11.10.15.0 255.255.255.0 ca /etc/openvpn/ca.crt cert /etc/openvpn/server.crt key /etc/openvpn/server.key dh /etc/openvpn/dh2048.pem log-append /var/log/openvpn.log status /var/run/vpn.status 10 user nobody group nogroup keepalive 10 120 comp-lzo verb 3 duplicate-cn script-security 3 plugin /usr/lib/openvpn/openvpn-auth-pam.so system-auth persist-tun persist-key tun-mtu 1500 mssfix 1212 client-to-client ifconfig-pool-persist ipp.txt Here is TCP/UDP based windows CLIENT config: remote xx.xx.xx.xx --socket-flags TCP_NODELAY tls-client port 1194 proto tcp-client #proto udp dev tap #dev tun pull ca ca.crt cert latis.crt key latis.key mute 0 comp-lzo adaptive verb 3 resolv-retry infinite nobind persist-key auth-user-pass auth-nocache script-security 2 mssfix cipher BF-CBC

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• Debian (wheezy) force cache to RAM

  - by Marek Javurek

  I have Linux server running about 6 game servers. I have 3 GB total of RAM but I use only about 500 MB. Is there a way to cache one of my game servers (all the files - even not actually used maps etc. - about 1,5 GB) to RAM? The reason I want to do this is because my Linux server is virtual and the hard drives ar very slow, so there is really big IO wait time. IO: http://i.stack.imgur.com/7HLhB.png

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• Virtualbox two networks slow

  - by Petr Marek

  I am running an Ubuntu server guest on Win 7 guest, and am running a webrick server (RoR dev). If I have just a host-only network, everything works fine and the browser response is instant. However, if I add a second network (NAT), so that the server can connect to the internet (for various updates etc.), the host-to-guest access gets really slow. I can't use the bridge connection. I am using the port 3000 (RoR Webrick server) and connecting to the guest via internet browser on this port (eg http://192.168.56.102:3000). Any idea, what could be causing this? If I ping the IP from host console, I get < 0ms. Here are the settings (relevant info is in english; Povoleno vše is Everything is allowed):

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• Enforce using proxy in all browsers

  - by Petr Marek

  I've configured squid with squid with squidguard and when using proxy in browser it works fine. But I want to enforce using proxy (probably in iptables) in all browsers. Now it can be disabled in the browser settings by user. My setup is: one standalone pc with ubuntu running the squid and squidguard and on this very same device I want to somehow enforce using the proxy. Squid conf file has set: http_port 3128 transparent THX

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• Running SQL*Plus with bash causes wrong encoding

  - by Petr Mensik

  I have a problem with running SQL*Plus in the bash. Here is my code #!/bin/bash #curl http://192.168.168.165:8080/api_test/xsql/f_exp_order_1016.xsql > script.sql wget -O script.sql 192.168.168.165:8080/api_test/xsql/f_exp_order_1016.xsql set NLS_LANG=_.UTF8 sqlplus /nolog << ENDL connect login/password set sqlblanklines on start script.sql exit <<endl I download the insert statements from our intranet, put it into sql file and run it through SQL*Plus. This is working fine. My problem is that when I save the file script.sql my encoding goes wrong. All special characters(like íášc) are broken and that's causing inserting wrong characters into my DB. Encoding of that file is UTF-8, also UTF-8 is set on the XSQL page on our intranet. So I really don't know where could be a problem. And also any advices regarding to my script are welcomed, I am total newbie in Linux scripting:-)

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• netsh doesn't provide commands

  - by Petr Marek

  According to Netsh Commands for Wired Local Area Network (LAN) in Windows Server 2008 and Windows Server 2008 R2, netsh should provide commands such as netsh add profile filename="profile.xml" interface="Local Area Connection" but that's an unknown command for my netsh. Even if I enter netsh show /? it shows me only two options: 'show alias' and 'show helper'. Maybe some library/modules or something is missing? I tested with admin permissions in PowerShell.

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• VMWare Ubuntu guest multitouch touchpad

  - by Petr Marek

  Related: Use Synaptics Touchpad Scroll in VMware Guest I've read that it's not possible to enable multitouch in vmware guest. What confuses me, is that when I use something special (like two finger scroll) in guest OS, I can see the cursor change to the scrolling one. Is this some kind of virtualization bug or is there a possibility that I can enable multitouch in guest? Host: Windows 7 Guest: Ubuntu 12.04

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• SSD and intel i5 lagging

  - by Marek Javurek

  my "new" notebook has some really wierd lags during work, youtube video etc etc... Sometimes it has bluescreen during booting, sometimes after reboot. All my drivers are updated and SSD firmware too. this is my notebook parameters: Operating System MS Windows 7 64-bit SP1 CPU Intel Core i5 @ 2.40GHz: 57 °C Sandy Bridge 32nm Technology RAM 8,00 GB Dual-Channel DDR3 @ 665MHz (9-9-9-24) Motherboard LENOVO 12985VG (CPU): 58 °C Graphics SyncMaster (1680x1050@60Hz) AMD Radeon HD 6630M Series (Lenovo) Hard Drives 125GB Crucial M4-CT128M4SSD1 ATA Device (SATA-SSD) full specs here: http://speccy.piriform.com/results/Khr265gWVgk6vKTMrhdfhlS

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• Backing up default windows installation with dd from linux running on another partition - is this fe

  - by Marek

  I am preparing to reinstall my system. I am thinking about creating a multi boot with a linux distro+Windows 7 to choose from when starting up. I would love to be able to skip all the hassle of reinstalling Windows and all programs when it starts becoming too slow in the future, thus I would like to mirror my fresh Windows system partition with some programs preinstalled. I am thinking about installing Ubuntu, making a partition for windows, installing windows with the basic environment (Visual Studio, Office, etc.) then booting into Linux and making an image of the windows partition with dd. I am not familiar with linux at all so I am a little afraid something may go wrong along the way. Is it possible to do it this way? Will I be able to partition my existing disk for multi boot easily after I install Ubuntu? Will I be able to recover the Windows partition easily using dd when I will need to re-create a fresh windows partition in the future? What other (better) approach can you recommend to achieve the goal of easy disk mirroring (for free)?

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• Sorting downloads folder with bash script

  - by Marek

  I'm writing script for my own needs to sort Downloads folder on my mac in bash. I pass to the function parameters: source directory, destination directory and array of file extensions I want to move. My problem is that when function is in "find" line then it copies just one file with that extension but when I remove all variables and I put parameters directly then it works fine. What's going on ? function moveFaster(){ clear src=$1 dst=$2 typ=$3 if [ ! -d $dst ] then mkdir $dst fi for i in "${typ[@]}" do find $src -name "${i}" -exec mv {} ${dst} \; done }

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• Server freeze - how to debug

  - by Petr Peller

  I am running a Debian virtual server with Apache, PHP, MySQL. There is just 1 website with very low traffic running but the server very often (almost everyday) freezes and does not respond. When this happens the server is unreachable from web browser or by SSH and I have to go to administration of my provider and perform server hard reset after this the server seems to work fine. How can I find out what is causing the freezes? Linux vm2797 2.6.32-5-amd64 #1 SMP Tue Jun 14 09:42:28 UTC 2011 x86_64 GNU/Linux

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• Get the wireless adapter frequency-band mode in Windows 7

  - by Petr

  I have a dual-band 802.11n router operating in both frequency bands with the same SSID. My Windows 7 laptop has a dual-band wireless adapter. Is there a way to find out which frequency band is the one currently used by the client? Also, is there a way to set the preffered band? Thanks. EDIT1: The router is Linksys E4200 (V2) and I essentially want to keep the 2.4GHz band in the mixed-mode so that the legacy 802.11g devices can connect while allocating the 5.0GHz band for 802.11n devices. The laptop's adapter (Intel Centrino Ultimate-N 6300 ANG) can operate in both 802.11n modes. EDIT2: Related topic

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• Deploy Xen

  - by Marek Jelen

  I would like to deploy Xen virtualization, however I definately not sure which way to go. Citrix Xen Server has (AFAIK) better managment tools, but does not provide software raid. Ubuntu / CentOS has Xen installations and support software RAID. Is it worth to go and buy HW RAID or just stick with SW RAID and Xen budnled with linux distribution. Which way would you suggest? Are there any other things I should consider?

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• How to force MS Word 2010 to split words anywhere

  - by Petr Újezdský

  I want Microsoft Word 2010 to force split words exactly where the line ends, even if it is "wrong and unreadable". Font is some monotype (Courier New). The text is in Text field which has fixed width. I found some option in Text field Format - Wrap lines inside. But it only disables / enables whole wrapping. The text will be printed over uniform spaced boxes, each for one letter (postal order). Examples: Current: some text with | looooooooooong word | What i want: some text with looooooo | oooong word | I tried to google it for an hour, but everybody wants the exact opposite (hard spaces etc..)

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